shipwreck vs sinking ship

shipwreck

noun
  • destruction; ruin; irretrievable loss 

  • An event where a ship sinks or runs aground. 

  • A ship that has sunk or run aground so that it is no longer seaworthy. 

verb
  • To wreck a boat through a collision or mishap. 

sinking ship

noun
  • Something which is doomed; an impending debacle; an ongoing disaster. 

How often have the words shipwreck and sinking ship occurred in a corpus of books? (source: Google Ngram Viewer )